| Presentation | 2015-05-21 Study on a nanosize light-probe with a dielectric slot-waveguide Makoto Tsubokawa, Deqing Kong, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A new design for a nanosize light-probe with a slot-waveguide structure has been evaluated by a finite-difference time-domain simulation. The model, with a 50-nm slot core, enables illumination around the tip of the probe using a small optical spot 50–250 nm wide with 20%–30% transmission efficiency. Based on the high-index-contrast structure in a slot waveguide, a nanosize optical spot is easily generated, which is impossible with a normal slab waveguide. Similar properties of optical spot and transmission efficiency are obtained for different geometric configurations of flat-faced and tapered dielectric slot waveguides in illumination mode. The transmission efficiency of our models is the same or higher than that in conventional metallic tapered optical probes. When operating in illumination and collection modes, a near-field light reflected at 50–200-nm-wide measured objects is clearly observed, and a spatial resolution of ~50 nm is obtained. These findings suggest the potential for slot-waveguide structures to expand the versatility of nanosize optical probes. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical slab waveguide / Optical probe / Near-field light / High-index contrast structure |
| Paper # | OFT2015-3 |
| Date of Issue | 2015-05-14 (OFT) |
| Conference Information | |
| Committee | OFT |
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| Conference Date | 2015/5/21(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Hiroshi Naruse(Mie Univ.) |
| Vice Chair | |
| Secretary | (Sumitomo Electric Industries) |
| Assistant | Masaki Ohmura(Sumitomo Electric Industries) / Hidenobu Hirota(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Optical Fiber Technology |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study on a nanosize light-probe with a dielectric slot-waveguide |
| Sub Title (in English) | |
| Keyword(1) | Optical slab waveguide |
| Keyword(2) | Optical probe |
| Keyword(3) | Near-field light |
| Keyword(4) | High-index contrast structure |
| 1st Author's Name | Makoto Tsubokawa |
| 1st Author's Affiliation | Waseda University(Waseda Univ.) |
| 2nd Author's Name | Deqing Kong |
| 2nd Author's Affiliation | Waseda University(Waseda Univ.) |
| Date | 2015-05-21 |
| Paper # | OFT2015-3 |
| Volume (vol) | vol.115 |
| Number (no) | OFT-44 |
| Page | pp.pp.11-16(OFT), |
| #Pages | 6 |
| Date of Issue | 2015-05-14 (OFT) |